Reverend Sykes explains to Scout why the church is donating the collection to Tom Robinson’s wife. What are the reasons?

From the text:

“Didn’t you hear why?” asked Reverend Sykes. “Helen’s got three little’uns and she can’t go out to work—”

“Why can’t she take ‘em with her, Reverend?” I asked. It was customary for field Negroes with tiny children to deposit them in whatever shade there was while their parents worked—usually the babies sat in the shade between two rows of cotton. Those unable to sit were strapped papoose-style on their mothers’ backs, or resided in extra cotton bags.

Reverend Sykes hesitated. “To tell you the truth, Miss Jean Louise, Helen’s finding it hard to get work these days… when it’s picking time, I think Mr. Link Deas’ll take her.”